Hi Tim, Perhaps we're the only two, but you and I are in agreement. For several months, I've proposed that gravity/gale-force/hurricane-force wind was the cause of the tragedy. My thought was that the sudden wind threatened to dislodge the tent. But I like your idea of a snow wall that fell on the tent at least once and possibly twice. Once they dug out of the tent, the hikers could have tried to remove the snow from the tent and face hypothermia or walk down to the trees and risk hypothermia. I think without panicking, they made the decision to head for the shelter of the trees. They fought courageously, but the brutal cold was too much to overcome.
Obviously this will forever remain speculation, although hikers dying in Sweden under similar conditions, adds some weight to this theory.
If the hikers died at the hands of the KGB or Soviet military, perhaps somehow, somewhere, documentation will be found and the mystery solved.